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,现手上有58%的H2O2想把
提纯
到90%以上,每次只需2ml,请问各有没有简便的方法?
提纯
硝酸
happyyes
11年2个月前
发表于
化学
内容:众所周知,发烟硝酸非常难买,而且容易挥发,请问如何
提纯
发烟硝酸呢?
怎样
提纯
苯酚?
sam_jin3887
15年1个月前
发表于
化学
内容:学校的苯酚氧化的一塌糊涂,请问怎样
提纯
?
金沙如何
提纯
.
kk
17年9个月前
发表于
化学
内容:金沙如何
提纯
.一种从河沙洗出的黑色矿物,里面含黄金,用什么方法提黄金最简便,经济.谢谢回复!
[教程] 如何
提纯
银
北落师门
13年5个月前
发表于
化学
内容:常见金属都能溶解于稀硝酸中,如果反应结束,烧杯中没有沉淀产生,那就不必过滤,如果有黑色的絮状物,我估计是铁氧化物或者铅之类,必须过滤掉,不然等于没
提纯
。,我手头没有杂银了,都被我
提纯
完了,就用硝酸银代替下吧.... 1溶解 我搅啊搅.... 2溶解完毕后,就要氯化钠上场了,我这里用的是食用盐 多放点,反正盐不值钱,而我们要把溶液中的银离子全部沉淀下来,倒掉上面的液体会有部分氯化银损失,不过如果能静置够久的话损失还是挺小的 清水冲洗几次,在这个步骤里别的可溶性离子都会被洗去,原金属中的铜、铁之类的都随这水一起飘走了....完成后,就得到了纯净的氯化银,至此,
提纯
已经过了一半了
AR试剂的
提纯
【转】
123123123
13年7个月前
发表于
化学
内容:在有机化学实验中,经常使用各类溶剂作为反应介质或用来分离
提纯
粗产物。,3.丙酮市售丙酮中往往含有甲醇、乙醛和水等杂质,可用下述方法
提纯
。
弱弱伸个手,求不剁爪:鲁米诺的
提纯
和保存
rpg-7
9年10个月前
发表于
化学
内容:和朋友一起合成了鲁米诺,发光成功了,但是剩下一些,求助度娘:鲁米诺
提纯
/精炼/纯化 都没有收到很有用的信息,请科创各位站友帮个忙
各位同仁硫酸银怎么
提纯
银,简单方便的方法
红尘醉387878
11年4个月前
发表于
化学
内容:最近有人问我怎么从硫酸银固体中提取银,我实验用浓硫酸溶解然后在用铁置换,但是量很少,不容易
提纯
,请各位指点,
请问在农药店买到的硝酸钾做KNDX是否需要
提纯
?
叛逆·大白鼠
15年5个月前
发表于
喷气推进
内容:请问在农药店买到的硝酸钾做KNDX是否需要
提纯
?
酒精脱销,买了六斤白酒
提纯
。
梧桐雨西岭雪2
4年4个月前
发表于
化学
内容:遂去卖酒店打了6斤白酒
提纯
再稀释至75%满瓶的为6斤,此处已被我妈截留一部分用于做菜(笑)。
化学入门采购以及kn的
提纯
Ruzen
1年4个月前
发表于
化学
内容: 我虽然不是大佬,但也入门一段时间了,还记得刚入门被坑了70元,所以写了这篇文章,给准备入门的新人一个建议,防止新人被坑首先,你要明确你要做些什么,像我是做kn的
提纯
晶体,还有一些不是很剧烈的反应,如果你跟我一样,3.500ml塑料试剂瓶4.25ml滴管5.15cm玻璃搅拌棒6.吸水纸7.200ml烧瓶(配橡胶塞)8.橡胶软管9.蛇形冷凝管15cm10.50ml塑料量杯11.电子温度计 然后就是药品了,因为我需要
提纯
, 试验篇因为我玩火箭,所以这里拿kn的
提纯
举例首先
(比如不会被电解且加热分解并需要
提纯
的不饱和溶液)
七公里垃圾站职业技术学院
9年6个月前
发表于
化学
内容:做完后,我的想法是电解38%的工业盐酸,
提纯
(稀盐酸沸点高,蒸发时会和水一起蒸发出来,网上也没有蒸发盐酸
提纯
的做法)原本我还想
提纯
双氧水,原谅我的SB想法…… 这个也应该能用于
提纯
其他的溶液吧……
提纯
触点上的银剩下大量的铜怎么办?
小陈
11年10个月前
发表于
化学
废液需要过滤吗?哪个阶段过滤?有些触电基座不是铜是铁还用往里加铁钉吗?废液里大量铜怎么办?求详细教程
第一次制得粗产品740克,进行重结晶
提纯
,第二次的2升高型烧杯,产品把电极固定了,正在想办法溶解
耶苏2009
3年0个月前
回复于
化学
内容:第一次制得粗产品740克,进行重结晶
提纯
,第二次的2升高型烧杯,产品把电极固定了,正在想办法溶解
我有一种合金 大约10种成分 ,怎么挨个
提纯
?
小陈
11年11个月前
发表于
化学
成分:co(C) 10-30 含量(%) ni 10-30 cu 30-50 sn 5 pb 5 zn 5-10 mn 5...
紧急求助:硝酸镁
提纯
稀硝酸,可否用硝酸镁结晶法?
jeilly6100
9年11个月前
发表于
化学
如题。 过程如下,昨天尝试用无水硝酸镁混合68%硝酸,再进行蒸馏,但因为没有真空泵,导致硝酸与硝酸镁混合液体在加热至100度时,依然无法有效的通过冷凝管。 本来是打算着淘宝买个真空泵再继续进行操作,但今天打开药品柜一看,昨天储存无水硝酸镁与稀硝酸的容器,硝酸镁结晶了。上面是一层略带棕色的液体,于是将液体倒出来分开装好了,准备重加热底层硝酸镁结晶体。 因为无法判断表层液体,是否为发烟硝酸,特拍照...
Re:请问在买到的硝酸钾做KNDX是否需要
提纯
?
彼岸江山
15年5个月前
回复于
喷气推进
要,一定要!!农药店买的一定要!!!
ANPU火箭燃料及其成品发动机
灵魂边缘
5年11个月前
发表于
航空航天
科创基金
内容:但是实际试验中,由于种种因素影响,会产生很多费用(比如,原料不纯,需要
提纯
),希望科创能资助一部分。
金属铯的蒸馏提纯
性感铷铷
1年10个月前
回复于
化学
科创基金
内容:首先未
提纯
铯没那么贵,也就80每克左右,另外氯化铯没那么贵,一克2r不到,另外产率只有50%
治疟药青蒿素与中医无关
154454496
6年10个月前
回复于
科学技术学
内容:我已经说过,中药以前是没条件
提纯
,但是现在有条件了可以
提纯
,OK?,你丫的连哪种成分有用都不知道,你上哪儿
提纯
去
制备高氯酸铵
MARK_GYC
1年5个月前
回复于空间文章
制备高氯酸铵
内容:这样就可以尽可能的
提纯
高氯酸钠(90%的纯度以上),然后直接制备高氯酸铵?
求教一下,关于金属凝固时产生的晶体
北落师门
13年10个月前
回复于
物理
内容:那种表面起泡的银在熔化的时候会有气泡不停地翻上来,不过怎么看都像是底板受潮了...但是我没
提纯
过的就不会起泡,同一块板上熔化的会不会是在
提纯
过程中混入了某些杂质?
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